JPH0716565Y2 - Portable metal band welding type binding machine - Google Patents

Description

[Detailed Description of the Invention] [Industrial field of application] The present invention relates to a binding machine for binding objects using a metal strip, and more specifically, by welding the overlapping portion of a bound metal strip that can be energized by welding. The present invention relates to a compact, easy-to-handle, portable binding machine for joining.

[Conventional technology]

Machines for binding objects that require strong binding using metal bands have been used for many years, and they have played a major role in modern logistics processes, and are still being used as increasingly important tools today. ing. As a method of binding an object with a metal band and joining its overlapped portions, there are seal notch joining, seal crimp joining, sealless joining, welding joining, etc., depending on the mode of the bound object and the binding purpose,
Appropriate methods have been selected and applied for each, but in general, from the aspects of binding certainty and binding strength, and the ease of automatic mechanization, a seal notch joining binding machine mainly made of steel strip is used. Has been used a lot. However, in this seal notch joining method, in addition to the metal band to be bound, a sealing seal for covering the overlapped portion of the metal band is required, and there is a problem in that the cost increases accordingly. Further, since the metal band joint part surrounds the metal band as described above with a seal and surrounds the part with a notch, and makes a notch cut, the joint part becomes unnecessary inclusions with respect to the bundled object, It often causes damage to the bundle. A binding machine that adopts the above-mentioned welding and joining method as a means for solving such a difficulty has appeared as a stationary automatic binding machine as seen in Japanese Patent Publication No. 53-14039 and has been active in its applicable fields. It was However, this welding type binding machine requires a large transformer for obtaining a strong welding current, and the electrode pressurizing device is also a powerful and large type, which exists as a so-called large automatic binding machine. Its use was naturally subject to space and time restrictions. In other words, it was a hope that it would not be a welding type binding machine that is lightweight and compact and can be easily carried by the user.

On the other hand, the seal crimp joining method requires no wax for the steel strip to be used, and thus involves problems such as rust generation during long-term storage.
The tensile force is strong, but the pushing force has no joining effect at all, and it uses the expanding force of the bundled body after compression joining such as Kottton bale to maintain the joining, both of which are unfamiliar to Japanese industry. It was rarely used as

[Problems to be solved by the invention]

As mentioned above, the welding and joining method has many merits as a method of bundling using a metal band, that is, it is economically advantageous because it does not require a seal, and it is safe in terms of quality due to the simplicity of the joint. However, the biggest reason that no small portable binding machine was to be put to practical use was that the transformer for securing and controlling the welding current required for metal welding was large, which was good. It was difficult to miniaturize the electrode pressing mechanism for forming the weld nugget and securing the welding strength, and furthermore, it is not possible to overcome the difficulty of consolidating into a lightweight and compact structure while having these functions. That is.

Upon seeing the advent of small transformers, the present inventors immediately found the relationship between the welding strength required for trial manufacture of a small pressure mechanism and metal band welding and the pressure applied to obtain it, the current value, and the energization time, and to satisfy these. After repeated trials for a compact structure, we have earnestly pursued research to provide a portable welding type binding machine that is lightweight, compact, and extremely easy for the user to handle.

[Means for solving problems]

As a result of the above examination, in a portable binding machine that binds objects using a metal band, including a metal band tightening device, a metal band joining device, and a surplus band metal cutting device, the metal band is an electrically conductive metal band. For example, not only steel strips but also stainless steel strips, copper strips, brass strips, aluminum strips, etc. are used, and as the metal strip joining device, a plurality of pairs of electrodes for welding and joining the metal strip overlapping portions, The electrodes are equipped with a uniform pressurizing mechanism for uniformly pressing the metal band overlapping portion, a transformer for applying a voltage to each of the electrodes to energize them, and a timer for controlling the welding energizing time, and the binding machine is User 1
It has a weight that can be carried by a person.

[Action]

The operation of the portable metal band welding type binding machine (hereinafter simply referred to as a binding machine) according to the present invention is such that the metal band is first circulated around the object to be bound, and the tip of the metal band is bound by the user. Locked by the metal band tip locking device of the binding machine placed on the object, and the succeeding metal band is polymerized on the band line of the binding machine,
Push the operating lever and tighten firmly with the metal band tightening device.
After that, the operating lever for welding is turned on to lower the upper electrode, and the metal band overlap portion is sandwiched between the lower electrode and each electrode to pressurize equally strongly, but in the process of lowering the upper electrode, An excess metal strip cutting device is operated by using an air cylinder, which is a power source of the electrode uniform pressing mechanism, to cut a subsequent excess metal strip. Thus, at the same time the metal strip overlap portion is strongly pressed uniformly, the welding current is applied by the energization timer, and the metal strip overlap portion between the upper and lower electrodes forms a weld nugget, and that portion is melt-bonded. The energizing time is regulated by the time value set in advance by the energizing timer depending on the material and thickness of the metal strip, and a good welding condition is formed. The joining force is strong and about 1,800 in the case of two-point welding. K
g Three-point welding has a tensile strength of about 2,000 kg or more. Of course, it depends on the thickness and material of the metal strip, but if it is expressed differently, the two-point welding is about 90% of the strength of the joining base metal. ~ 95%, more than 100% in three-point welding, and even if the base metal band is broken, a strong joining force is formed so that the welded part is not cut. When the energization is completed, the reset lever is pushed, each mechanism of the binding machine is restored, the metal band binding by welding is completed, and the user removes the binding machine from the bound object.

〔Example〕

Hereinafter, a preferred embodiment of the present invention will be described in detail with reference to the drawings.

FIG. 1 is a schematic side view of a portable metal band welding type binding machine for two-point welding (hereinafter, simply referred to as a binding machine as in the previous section), FIG. 2 is a plan view thereof, and FIG. 3 is AA of FIG. I showed a view from the arrow,
Metal band tightening device 2, metal band welding device on the binding machine base 1.
3, a metal band tip locking device 5, a surplus metal band cutting device 6, etc. are provided so that when the binding machine is placed on a bundled object, it is convenient to hold and operate the binding machine. Holding lever 8
Was set up.

The metal band tightening device 2 is configured to drive the tightening wheel 22 by using the air motor 21 as a drive source, as is well known, and is connected to the air cylinder 23 so that the tightening wheel 22 can be brought into and out of contact with the metal band. An operation lever 71 is separately provided for these operations.

The metal band front end locking device 5 is mainly composed of a locking lever 51 which has a locking claw 53 at the lower end and is configured such that the locking claw 53 is constantly pressed against the binding machine base 1 by a spring 52 with the vicinity of the lower part as a fulcrum. When the locking lever 51 is pressed, the locking claw 53 is raised and the tip of the metal band can be locked easily.

The surplus metal band cutting device 6 is composed of a cutter presser 61 that descends together with the electrode uniform pressing device 40, an upper cutter 62 that is pressed down by the upper cutter presser 61, and a lower cutter 63 that is fixed to the binding machine base 1. The upper cutter 62 is provided with a spring (not shown) for restoring the upper cutter 62 upward.

The metal band welding device 3 is shown in detail in FIG. 4 in a sectional view. The electrode holder 30, the upper electrodes 32, 32, the lower electrodes 33, 33, the air cylinder 31 for electrode pressing, the uniform pressing mechanism 40 and Insulating plate for insulating the uniform pressing mechanism 40 and the electrode holder 30.
Equipped with a transformer 3 as can be seen in FIGS.
5, equipped with energizing plates 37, 38.

As shown in FIG. 4, the uniform pressurizing mechanism 40 has a cylindrical piston rod 41 fixed to a piston 39 of the air cylinder 3, and a pressurizing cylinder 42 is housed inside the piston rod 41. It is connected to the electrode holder 30 via an insulating plate 34.
The electrode holder 30 accommodates and holds the upper electrodes 32, 32 in a replaceable manner.

The piston rod 41 and the pressurizing cylinder 42 are connected by penetrating the supporting round bar 43 at right angles to the direction of the arrangement of the upper electrodes 32, 32 through the elliptical hole 49 formed in the pressurizing cylinder 42 (the supporting round bar 43 is the elliptic hole. It is fixed to the piston rod 41 in a state where there is some play in the vertical and horizontal directions in 49) to support the gravity of the pressure cylinder 42, and the pressure cylinder 42 is attached to the vertical axis inside the piston rod 41. On the other hand, it has a margin to be able to incline slightly. The spring supports 47 are provided around the spring supports 47 at four points in parallel and at right angles to the direction in which the upper electrodes 32, 32 are arranged, and the spring supports 47 are embedded in the bottom surface of the piston rod 41.
Moreover, spring holders 45 for supporting the outer circumferences of the springs 46 are fitted to the lower portion of the piston rod 41 and the pressurizing cylinder 42 is fitted inside. A “bran” is formed at the bottom of the pressure cylinder 42 to support the spring holder 45. Further, an upper cutter holder 61 is attached to the spring holder 45.

A pressurizer 44 is slidably housed inside the pressurizing cylinder 42, and a disc spring 48 is further housed at the bottom thereof.

On the other hand, in order to operate the binding machine, that is, to tighten the metal band, the operating lever 71, which is connected to the air motor 21 and the air cylinder 23, and for the metal band welding, the air cylinder 31 and the unillustrated welder. An operating lever 73 connected to a timer for time control and a reset lever 72 for releasing these operations and returning them to their original positions are provided above the air cylinder 31.

In order to facilitate the operation of the binding machine, a suspending metal 9 for suspending the binding machine is fixed to a part of the metal band tightening device 2 on a balancer (not shown) or the like.

Now, the operation of the binding machine will be described.

First, the binding machine is placed on the binding object, the metal band is circulated around the binding object, and the tip end thereof is locked by the metal band tip locking device 5 of the binding machine. Then, the metal strips are aligned with the electrode positions of the binding machine to superimpose subsequent metal strips, and the subsequent metal strips are set between the upper cutter 62 and the lower cutter 63 of the surplus metal strip cutting device 6. After that, when the operation lever 71 is pushed down and the tightening wheel 22 is brought into contact with the metal band, the air motor 21 starts to drive and the tightening wheel 22 rotates clockwise, so that the metal band that circulates around the bound body is pulled. Tighten and bind tightly. Thus, when the operating lever 73 is pushed down while the stall tension remains on the metal strip, the piston rod 41 of the uniform pressurizing mechanism 40 descends and the supporting round bar 43
Clears the clearance of the elliptical hole 49 and contacts the pressurizer 44 to press down the pressurizer 44, and presses down the inner diameter bottom surface of the pressurizing cylinder 42 via the disc spring 48, the insulating plate 34, the electrode holder. The upper electrodes 32, 32 are evenly pressed through 40. At this time, the upper cutter retainer 61 attached to the spring holder 45 descends and the subsequent metal strip set between the upper cutter 62 and the lower cutter 63 is cut and removed as a surplus metal strip. The metal band overlapped part that is strongly pressed between the upper electrodes 32, 32 and the lower electrodes 33, 33 starts welding by the operation of the energizing timer (not shown) that automatically turns on automatically. Next to
With the passage of the preset energization time value, the energization timer turns off and welding is completed. Then, when the reset lever 72 is pushed down, the band tightening device 2, the band welding device 3, and the surplus metal band cutting device 6 are restored to their original positions.
Thus, the locking lever 51 is pushed down to lock the metal strip end with the locking claw 53.
Then, the binding machine is unloaded from above the body to be bound, and the binding work by welding the metal strips is completed.

〔effect〕

The use of the portable metal band welding type binding machine provided by the present invention ensures that a so-called heavy binding using a metal band is performed without using a seal, and that it can be seen by a single user who has never seen before. We are convinced that it will be a powerful tool in the logistics world in the future, because it can be performed at a convenient location and at a low cost at a low cost and in a safe condition.

[Brief description of drawings]

The drawings show one embodiment of the present invention. FIG. 1 is a schematic side view of the same, FIG. 2 is a plan view, and FIG. 3 is A- of FIG.
FIG. FIG. 4 is a partial cross-sectional view of the metal band welding device. 1 ... Binder machine base, 2 ... Metal band tightening device, 3 ... Metal band welding device, 5 ... Metal band tip locking device, 6 ... Excessive metal band cutting device, 8 ... Holding lever, 9 ... … Hanging hardware, 21
...... Air cylinder, 22 ...... Tightening wheel, 23 ...... Air cylinder, 30 ...... Electrode holder, 31 ...... Air cylinder, 32 ...... Upper electrode, 33 ...... Lower electrode, 34 ...... Insulation plate, 35 ...
… Transformer, 37 …… energizing plate, 38 …… energizing plate, 39 …… piston, 40 …… equal pressure mechanism, 41 …… piston rod, 42
...... Pressure cylinder, 43 ...... Supporting round bar, 44 ...... Pressurizer, 45 ...... Spring holder, 46 ...... Spring, 47 ...... Spring support, 48 ...... Disc spring, 49 ...... Elliptical hole, 51 ... … Locking lever, 52 …… Spring, 53 …… Locking claw, 61 …… Upper cutter presser, 62 …… Upper cutter, 63 …… Lower cutter, 71 ……
Control lever, 72 ... Reset lever, 73 ... Control lever.

Claims (1)

[Scope of utility model registration request] 1. A portable binding machine for binding objects using a metal band, the device including a metal band tightening device, a metal band joining device and a surplus metal band cutting device, wherein the metal band is a metal band capable of conducting electricity, As a metal band joining device, a plurality of pairs of electrodes for welding and joining the metal band overlapping parts, a uniform pressurizing mechanism for uniformly pressing the metal band overlapping parts by each electrode, and applying a voltage to each electrode. A transportable metal band welding type binding machine, comprising a transformer for energizing and a timer for controlling welding energization time, and the binding machine has a weight that can be carried by one user.